VA
Viola Anderson — 1920 US Census Record
Model Tree available1920 United States Federal Census · Black Hawk, Iowa
Our Model Tree links this Viola Anderson across the 1920, 1930 and 1940 US Censuses in Black Hawk, Iowa (XGBoost, ~Confirmed), with identified parents Nels & Peter — first a daughter (b.~1910), then head of a 5-person household.
Age 10
b. ~1910
Female
Daughter
Born: Iowa
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Black Hawk, Iowa |
| Surname | Anderson |
| Given Name | Viola |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Additional Details | |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Waterloo City |
| Est. Birth Year | ~1910 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
5 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Viola | Age | Birth yr |
|---|---|---|---|---|
| Peter Anderson | Head | — | 34 | ~1886 |
| Henry Larson | Other | — | 19 | ~1901 |
| Marie Anderson | Spouse | — | 38 | ~1882 |
| Carl Anderson | Son | — | 16 | ~1904 |
| Viola Anderson | Daughter | — | 10 | ~1910 |
Census Appearances
1920
Black Hawk, …
Daughter, age 10
Black Hawk, Iowa · implied b. ~1910 — 5 household members
| Surname | Anderson |
| Given Name | Viola |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Black Hawk, …
Daughter, age 20
Black Hawk, Iowa · implied b. ~1910 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Andersen |
| Given Name | Viola |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Teacher |
| Industry | School |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Tama-County, Iowa
Daughter, age 30
Tama-County, Iowa · implied b. ~1910 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Andersen |
| Given Name | Viola |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Oneida |
| 1935 Residence (County) | Tama |
| Occupation | Labor |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 40 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Viola Anderson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Nels Andersen (~0.92 confidence) and father Peter Anderson (~0.92 confidence) and mother Marie Anderson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Nels Andersen
b. ~1885
Source father
● Household
· direct · ~0.92
Father
Peter Anderson
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Marie Anderson
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Viola Anderson
Daughter · 1920 · age 10 · b. ~1910 · Iowa
★ You are viewing this record
Sibling
Carl Anderson
Sibling · 1920 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Black Hawk, Iowa
Open full size
1920 US Federal Census — Black Hawk, Iowa
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu478unit:0705)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Lydia Dunham | 34 | — | — | Iowa |
| 52 | Warren J. Dunham | 9 | — | — | Iowa |
| 53 | Robert E. Dunham | 6 | — | — | Iowa |
| 54 | Peter C. Anderson | 34 | Head | Moulder | Denmark |
| 55 | Marie Anderson | 38 | Wife | Laundress | Denmark |
| 56 | Carl Anderson | 16 | Son | — | Denmark |
| 57 | Viola Anderson THIS PERSON | 10 | Daughter | — | Iowa |
| 58 | Henry Larson | 19 | Nephew | Laborer | Denmark |
| 59 | Harry G. Saylor | 36 | Head | Contractor | Pennsylvania |
| 60 | Blanche E. Saylor | 38 | Wife | — | Pennsylvania |
| 61 | Fern G. Saylor | 9 | Daughter | — | Iowa |
| 62 | Ella Grace Saylor | 5 | Daughter | — | Iowa |
| 63 | Milo L. Saylor | 2 | Son | — | Iowa |
| 64 | James D. Caldwell | 66 | Head | Manager | Ohio |
| 65 | Margaret E. Caldwell | 61 | Wife | — | Pennsylvania |
| 66 | Arch M. Mclaren | 30 | Head | Moulder | Illinois |
| 67 | Juanita S. Mclaren | 25 | Wife | — | Iowa |
| 68 | Donald M. Mclaren | 6 | Son | — | Iowa |
| 69 | Marjorie M. Mclaren | 4 | Daughter | — | Iowa |
| 70 | Bertha Martine | 22 | Roomer | Stenography | Iowa |
| 71 | Frank L. Robinson | 59 | Head | Bailiff | Indiana |
| 72 | Stella M. Robinson | 58 | Wife | — | Iowa |
| 73 | Ruth L. Robinson | 22 | Daughter | Deputy Clerk | Iowa |
| 74 | Bella B. Frederking | 21 | Roomer | Stenographer | Illinois |
| 75 | Robert R. Francis | 28 | Head | Tool Designer | Iowa |
| 76 | Jewel E. Francis | 26 | Wife | — | Wisconsin |
| 77 | Patricia J. Francis | 1 | Daughter | — | Iowa |
| 78 | Elizabeth J. Kubly | 70 | Mother-in-law | — | Switzerland |
| 79 | Clarence H. Chaney | 29 | Head | Vice President | Kansas |
| 80 | Eva L. Chaney | 27 | Wife | — | Iowa |
| 81 | Clarence J. Chaney | 4 | Son | — | Arkansas |
| 82 | W. Clifford Chaney | 1 | Son | — | Iowa |
| 83 | Jay H. Miller | 31 | Head | Letter Carrier | Iowa |
| 84 | Hazel C. Miller | 24 | Wife | Fitter | Iowa |
| 85 | Lewis Miller | 52 | Head | Agent | Iowa |
| 86 | Martha A. Miller | 43 | Wife | — | Pennsylvania |
| 87 | Glen H. Miller | 19 | Son | — | Iowa |
| 88 | Max H. Miller | 17 | Son | — | Iowa |
| 89 | Paul J. Miller | 10 | Son | — | Iowa |
| 90 | Martha J. Miller | 9 | Daughter | — | Iowa |
| 91 | Julia A. Miller | 8 | Daughter | — | Iowa |
| 92 | Lewis Jr. Miller | 2 | Son | — | Iowa |
| 93 | Frank Reed | 25 | Hired man | Laborer | Illinois |
| 94 | Clyde S. Miller | 21 | Head | Operator | Iowa |
| 95 | Lucille Miller | 19 | Wife | — | Iowa |
| 96 | Lena B. Standish | 46 | Head | — | Iowa |
| 97 | Lorane Standish | 20 | Daughter | — | Iowa |
| 98 | Ruth Le Lord Standish | 15 | Daughter | — | Iowa |
| 99 | Horace H. Randall | 41 | Head | Partner | Iowa |
| 100 | Minnie Randall | 37 | Wife | — | Iowa |
Pedigree Summary
Viola + 1 sibling
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)